Sungai Raya weather in September

In September, Sungai Raya sees average daytime highs of 29°C and overnight lows near 25°C, with 210 mm of rain across 21.4 wet days and about 12 hours of daylight. It is the 6th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Sungai Raya's 7th-clearest and 6th-windiest month. For the whole year in context, see Sungai Raya's year-round climate.

Daytime high: 29°; 6th warmest
Overnight low: 25°; 7th coldest
Rainfall: 210 mm; 21.4 wet days
Daylight: 12 hours; 5:39 AM – 5:39 PM
Cloud cover: 85%; 7th clearest
Wind: 8 km/h; 6th windiest
Solar energy: 5.21 kWh/m²
Travel score: 3.6; out of 10

← August Sungai Raya year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Sungai Raya reaches about 29°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	29	25
18	29	25
19	29	25
20	29	25
21	29	25
22	29	25
23	29	25
24	29	25
25	29	25
26	29	25
27	29	25
28	29	25
29	29	25
30	29	25

How September really feels in Sungai Raya

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sungai Raya weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	28° / 24°	287	25.5	12	3.5
Feb	29° / 24°	184	19.9	12	3.8
Mar	29° / 24°	198	22.1	12	3.7
Apr	30° / 25°	224	25.1	12	3.2
May	30° / 25°	230	24.7	12	3.3
Jun	30° / 25°	192	19.9	12	3.7
Jul	30° / 25°	173	18	12	4.1
Aug	30° / 25°	164	18.4	12	3.9
Sep	29° / 25°	210	21.4	12	3.6
Oct	29° / 24°	320	27.1	12	3.2
Nov	29° / 24°	405	29	12	2.9
Dec	28° / 24°	395	28.4	12	3.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 89%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	14	14	13	13	13	13	12	12	11	11	11	11	10	10	10	10	10	10	10	10	10	10	9	9	9	9	9	8	7	7
Cloudier (%)	86	86	87	87	87	87	88	88	89	89	89	89	90	90	90	90	90	90	90	90	90	90	91	91	91	91	91	92	93	93

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	13	87
4	13	87
5	13	87
6	13	87
7	12	88
8	12	88
9	11	89
10	11	89
11	11	89
12	11	89
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	8	92
29	7	93
30	7	93

Chance of precipitation in September

Any precipitation

Sungai Raya gets around 210 mm of rain over 21.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 72% and peaks near 79% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	72	72	72	72	72	72	71	71	70	70	69	69	68	68	68	68	68	69	69	70	71	71	72	73	74	75	76	77	78	79

	Rain chance (%)
1	72
2	72
3	72
4	72
5	72
6	72
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	68
17	68
18	69
19	69
20	70
21	71
22	71
23	72
24	73
25	74
26	75
27	76
28	77
29	78
30	79

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Oppressive (%)	68	69	69	70	70	71	71	71	71	70	70	69	69	68	68	67	66	66	65	65	64	64	64	63	63	63	62	62	62	62
Miserable (%)	32	31	31	30	30	29	29	29	29	30	30	31	31	32	32	33	34	34	35	35	36	36	36	37	37	37	38	38	38	38

	Oppressive (%)	Miserable (%)
1	68	32
2	69	31
3	69	31
4	70	30
5	70	30
6	71	29
7	71	29
8	71	29
9	71	29
10	70	30
11	70	30
12	69	31
13	69	31
14	68	32
15	68	32
16	67	33
17	66	34
18	66	34
19	65	35
20	65	35
21	64	36
22	64	36
23	64	36
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	62	38
30	62	38

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	8	8	8	8	8	8	8	8	8	8	8	8
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	9	calm
4	9	calm
5	9	calm
6	9	calm
7	9	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	9	calm
19	8	calm
20	8	calm
21	8	calm
22	8	calm
23	8	calm
24	8	calm
25	8	calm
26	8	calm
27	8	calm
28	8	calm
29	8	calm
30	8	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over September. Sunrise moves from 5:44 AM to 5:34 AM, and sunset from 5:45 PM to 5:34 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	5:44	5:43	5:43	5:43	5:42	5:42	5:42	5:41	5:41	5:41	5:40	5:40	5:40	5:39	5:39	5:39	5:38	5:38	5:38	5:37	5:37	5:37	5:36	5:36	5:35	5:35	5:35	5:35	5:34	5:34
Sunset (PM)	5:45	5:44	5:44	5:43	5:43	5:43	5:42	5:42	5:42	5:41	5:41	5:40	5:40	5:40	5:39	5:39	5:38	5:38	5:38	5:37	5:37	5:36	5:36	5:36	5:35	5:35	5:35	5:34	5:34	5:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	5:44	5:45
2	12.0	5:43	5:44
3	12.0	5:43	5:44
4	12.0	5:43	5:43
5	12.0	5:42	5:43
6	12.0	5:42	5:43
7	12.0	5:42	5:42
8	12.0	5:41	5:42
9	12.0	5:41	5:42
10	12.0	5:41	5:41
11	12.0	5:40	5:41
12	12.0	5:40	5:40
13	12.0	5:40	5:40
14	12.0	5:39	5:40
15	12.0	5:39	5:39
16	12.0	5:39	5:39
17	12.0	5:38	5:38
18	12.0	5:38	5:38
19	12.0	5:38	5:38
20	12.0	5:37	5:37
21	12.0	5:37	5:37
22	12.0	5:37	5:36
23	12.0	5:36	5:36
24	12.0	5:36	5:36
25	12.0	5:35	5:35
26	12.0	5:35	5:35
27	12.0	5:35	5:35
28	12.0	5:35	5:34
29	12.0	5:34	5:34
30	12.0	5:34	5:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.21 kWh/m².

For context, solar energy here swings from a low near 4.26 kWh/m² to a high of 5.39 kWh/m² in March across the year — September's 5.21 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.3	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.1	5.1	5.1
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.2	Bright
2	5.2	Bright
3	5.2	Bright
4	5.2	Bright
5	5.2	Bright
6	5.2	Bright
7	5.2	Bright
8	5.2	Bright
9	5.2	Bright
10	5.2	Bright
11	5.2	Bright
12	5.2	Bright
13	5.2	Bright
14	5.2	Bright
15	5.2	Bright
16	5.3	Bright
17	5.3	Bright
18	5.3	Bright
19	5.3	Bright
20	5.3	Bright
21	5.2	Bright
22	5.2	Bright
23	5.2	Bright
24	5.2	Bright
25	5.2	Bright
26	5.2	Bright
27	5.2	Bright
28	5.1	Bright
29	5.1	Bright
30	5.1	Bright

Planning a trip in September

Is September a good time to visit Sungai Raya?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.6

Sightseeing

6th-best month of the year

4.8

Beach & pool

6th-best month of the year

September is a weaker month for outdoor sightseeing in Sungai Raya.

What to pack for Sungai Raya in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Sungai Raya sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Sungai Raya in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 30°C and coldest in February near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	28	28	29	30	30	30	30	29	29	29	30	29
Comfort	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical

	Sea temperature (°C)	Comfort
Jan	28	Tropical
Feb	28	Tropical
Mar	29	Tropical
Apr	30	Tropical
May	30	Tropical
Jun	30	Tropical
Jul	30	Tropical
Aug	29	Tropical
Sep	29	Tropical
Oct	29	Tropical
Nov	30	Tropical
Dec	29	Tropical

UV index in Sungai Raya in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sungai Raya peaks around February 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 11 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	16	15	14	13	11	11	13	13	14	12	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	16	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	13	Extreme
Jun	11	Extreme
Jul	11	Extreme
Aug	13	Extreme
Sep	13	Extreme
Oct	14	Extreme
Nov	12	Extreme
Dec	11	Extreme

Air quality in Sungai Raya in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Sungai Raya is worst in September — around 42 µg/m³ PM2.5 (poor), about 4.2× the cleanest month (January, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	10	11	13	14	13	13	15	31	42	23	12	10
Level	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Moderate	Moderate	Good

	PM2.5 (µg/m³)	Level
Jan	10	Good
Feb	11	Good
Mar	13	Moderate
Apr	14	Moderate
May	13	Moderate
Jun	13	Moderate
Jul	15	Moderate
Aug	31	Moderate
Sep	42	Poor
Oct	23	Moderate
Nov	12	Moderate
Dec	10	Good

Location & terrain

Where is Sungai Raya?

Sungai Raya sits at 0.7°N, 108.9°E, 9 m above sea level, in Indonesia. The nearest listed city is Singkawang, 25 km away.

Topography around Sungai Raya

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sungai Raya.

Within 3 km, the terrain around Sungai Raya has only modest variations in elevation — a maximum elevation change of 186 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 323 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,381 m.

The land around Sungai Raya is covered by trees (47%) and water (33%) within 3 km, water (48%) and trees (43%) within 16 km, and trees (49%) and water (46%) within 80 km.

3 km

186 m

trees 47%

16 km

323 m

water 48%

80 km

1,381 m

trees 49%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves

← August Sungai Raya year-round climate October →Best places to visit in September

September weather nearby: Singkawang 25 km · Pemangkat 52 km · Bengkayang 61 km · Kota Sambas 86 km · Pontianak 94 km · Lundu 151 km · Bau 160 km · Tebedu 167 km

Indonesia travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 29% of US; price level, 2025
GDP per capita: $5,060; 2025
Happiness: 5.6 / 10; World Happiness, 2025
Safe drinking water: 30%; of population, 2024
Homicide rate: 0.3; per 100k, 2022
Road deaths: 11.3; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 471
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sungai Raya (0.7°, 108.9°, elevation 9 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	29	25
18	29	25
19	29	25
20	29	25
21	29	25
22	29	25
23	29	25
24	29	25
25	29	25
26	29	25
27	29	25
28	29	25
29	29	25
30	29	25

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	13	87
4	13	87
5	13	87
6	13	87
7	12	88
8	12	88
9	11	89
10	11	89
11	11	89
12	11	89
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	8	92
29	7	93
30	7	93

	Rain chance (%)
1	72
2	72
3	72
4	72
5	72
6	72
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	68
17	68
18	69
19	69
20	70
21	71
22	71
23	72
24	73
25	74
26	75
27	76
28	77
29	78
30	79

	Oppressive (%)	Miserable (%)
1	68	32
2	69	31
3	69	31
4	70	30
5	70	30
6	71	29
7	71	29
8	71	29
9	71	29
10	70	30
11	70	30
12	69	31
13	69	31
14	68	32
15	68	32
16	67	33
17	66	34
18	66	34
19	65	35
20	65	35
21	64	36
22	64	36
23	64	36
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	62	38
30	62	38

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	29	25
18	29	25
19	29	25
20	29	25
21	29	25
22	29	25
23	29	25
24	29	25
25	29	25
26	29	25
27	29	25
28	29	25
29	29	25
30	29	25

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	13	87
4	13	87
5	13	87
6	13	87
7	12	88
8	12	88
9	11	89
10	11	89
11	11	89
12	11	89
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	8	92
29	7	93
30	7	93

	Rain chance (%)
1	72
2	72
3	72
4	72
5	72
6	72
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	68
17	68
18	69
19	69
20	70
21	71
22	71
23	72
24	73
25	74
26	75
27	76
28	77
29	78
30	79

	Oppressive (%)	Miserable (%)
1	68	32
2	69	31
3	69	31
4	70	30
5	70	30
6	71	29
7	71	29
8	71	29
9	71	29
10	70	30
11	70	30
12	69	31
13	69	31
14	68	32
15	68	32
16	67	33
17	66	34
18	66	34
19	65	35
20	65	35
21	64	36
22	64	36
23	64	36
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	62	38
30	62	38

	Avg high (°C)	Avg low (°C)
1	29	25
2	29	25
3	29	25
4	29	25
5	29	25
6	29	25
7	29	25
8	29	25
9	29	25
10	29	25
11	29	25
12	29	25
13	29	25
14	29	25
15	29	25
16	29	25
17	29	25
18	29	25
19	29	25
20	29	25
21	29	25
22	29	25
23	29	25
24	29	25
25	29	25
26	29	25
27	29	25
28	29	25
29	29	25
30	29	25

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	13	87
4	13	87
5	13	87
6	13	87
7	12	88
8	12	88
9	11	89
10	11	89
11	11	89
12	11	89
13	10	90
14	10	90
15	10	90
16	10	90
17	10	90
18	10	90
19	10	90
20	10	90
21	10	90
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	8	92
29	7	93
30	7	93

	Rain chance (%)
1	72
2	72
3	72
4	72
5	72
6	72
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	68
17	68
18	69
19	69
20	70
21	71
22	71
23	72
24	73
25	74
26	75
27	76
28	77
29	78
30	79

	Oppressive (%)	Miserable (%)
1	68	32
2	69	31
3	69	31
4	70	30
5	70	30
6	71	29
7	71	29
8	71	29
9	71	29
10	70	30
11	70	30
12	69	31
13	69	31
14	68	32
15	68	32
16	67	33
17	66	34
18	66	34
19	65	35
20	65	35
21	64	36
22	64	36
23	64	36
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	62	38
30	62	38